Deserialization not allowed error

Issue

After upgrading to AEM 6.2 or later version the application is failing with "Deserialization not allowed for class" errors (see example below).

java.lang.UnsupportedOperationException: Deserialization not allowed for class net.sf.ehcache.Element (on Thu Sep 21 12:29:55 CDT 2017)
at org.kantega.notsoserial.DefaultNotSoSerial.preventDeserialization(DefaultNotSoSerial.java:256)
at org.kantega.notsoserial.DefaultNotSoSerial.onBeforeResolveClass(DefaultNotSoSerial.java:248)
at org.kantega.notsoserial.ObjectInputStreamClassVisitor.onBeforeResolveClass(ObjectInputStreamClassVisitor.java:48)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1613)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1518)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1774)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1351)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:371)
at net.sf.ehcache.store.disk.DiskStorageFactory.read(DiskStorageFactory.java:370)
at net.sf.ehcache.store.disk.DiskStorageFactory.retrieve(DiskStorageFactory.java:886)
at net.sf.ehcache.store.disk.Segment.decode(Segment.java:172)
at net.sf.ehcache.store.disk.Segment.put(Segment.java:449)
at net.sf.ehcache.store.disk.DiskStore.put(DiskStore.java:438)
at net.sf.ehcache.store.FrontEndCacheTier.put(FrontEndCacheTier.java:267)
at net.sf.ehcache.Cache.putInternal(Cache.java:1455)
at net.sf.ehcache.Cache.put(Cache.java:1383)
at net.sf.ehcache.Cache.put(Cache.java:1348)